You can get realtime depth information for lakes in the US. We just got hit by a storm a few minutes ago and you can already see the impact on the depth of Lake Travis:

And here is the realtime graph:
You can get realtime depth information for lakes in the US. We just got hit by a storm a few minutes ago and you can already see the impact on the depth of Lake Travis:

And here is the realtime graph:
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Can you give a link on this page to where you found these on the USGS site?